EP 0024927 B1 19840808 - SURFACE ACOUSTIC WAVE RESONATOR DEVICE
Title (en)
SURFACE ACOUSTIC WAVE RESONATOR DEVICE
Publication
Application
Priority
JP 11030179 A 19790831
Abstract (en)
[origin: US4340834A] This disclosure concerns surface acoustic wave resonator devices having grating reflectors. The resonator comprises a substrate of piezoelectric material, an input interdigital transducer which converts electrical energy to surface acoustic wave energy, an output interdigital transducer which converts surface acoustic wave energy to electrical energy, first and second grating reflectors arranged in spaced aligned relationship on opposite ends of the substrate with the input transducer and the output transducer interposed therebetween the input transducer and the output transducer. The first grating reflector, whose aperture length is the same effective length as the input and output transducers, comprises a first group of interconnected parallel spaced conductors, a second group of interconnected parallel spaced conductors and at least one of isolated parallel conductors positioned between the first and second group of conductors. Each conductor of the one group is aligned with a corresponding conductor of the first group and a corresponding conductor of the second group. Each conductor of the first and second group is parallel and electrically interconnected. The second grating reflector is identical with the first grating reflector.
IPC 1-7
IPC 8 full level
H03H 9/25 (2006.01); H03H 3/08 (2006.01); H03H 9/02 (2006.01); H03H 9/64 (2006.01)
CPC (source: EP US)
H03H 9/02771 (2013.01 - EP US); H03H 9/643 (2013.01 - EP US); H03H 9/14552 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
US 4340834 A 19820720; DE 3068877 D1 19840913; EP 0024927 A2 19810311; EP 0024927 A3 19810318; EP 0024927 B1 19840808; JP S5635525 A 19810408; JP S5925525 B2 19840619
DOCDB simple family (application)
US 18174680 A 19800827; DE 3068877 T 19800828; EP 80302987 A 19800828; JP 11030179 A 19790831